mary: that was intentional, wasn't it? john: he used the wind that was against him and caught the inside of the ball and sliced away from djokovic. an unbelievable shot. john: djokovic appears the fresher of the two physically. he's moving exceptionally well. you see him inside the court there on the return. same for this ball. murray praying for some easy points here. to get a couple of big serves. mary: he's got so many different shots, off both different shots, off both sides. just a remarkable variety. at times, though, he hasn't been aggressive enough. he prefers to play those crafty points sometimes instead of just going for the kill shot. >> fault. bill: fourth double fault. 40-30. john: clearly the serve has been a problem for murray this set. djokovic is serving un believably well. murray is struggling now. this is the first set he's been well under 50%. >> out. bill: novak is not going to make it easy for him. and murray knows he's two points away from having to go points away from having to go five. seemingly in